如果按照以下方式连接,同时数据模块具有终端对时的特性,系统将运行正确。终端对时对于绝大多数数据同步单元来说是一种通用特性,它允许模块通过外部源进行对时。利用终端对时特性,按照如下连接即可实现双通道:在通常模式中,来自多路复用器?数据模块1的发送定时输出连接到UR-RS422接口的时钟输入上,同时,数据模块1的发送定时输出也将并联到数据模块2的终端对时输入上。采用这种结构,两个数据模块和两个UR-RS422通道
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